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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 265-285 days






2. Animals which have only one estrous cycle (ex: dog - fox)






3. To remove/separate testicles from animal's body before animal reaches puberty






4. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






5. Luteolysis happens because of the ____________ hormone






6. When are dairy cattle dehorned?






7. Animal which has been castrated after puberty






8. 114 days






9. What helps regulate spermatogenesis?






10. (LH) causes female's egg to break (her period)






11. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






12. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






13. 26 hours after estrus begins






14. Start of the reproductive tract for the female. located outside of the body






15. (switzerland) 2nd in size and milk production - most muscle -






16. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






17. Milk is 15% ________ and 85% __________.






18. 19-23 (21) days






19. Why Dairy calves are fed powdered milk.






20. Sperm is produced here






21. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






22. Superior genes are _______ to multiply






23. 45-60 days after breeding; re-breed as required






24. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






25. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






26. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






27. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






28. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






29. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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30. When are steers and heifers weaned from bottle feeding?






31. 1-2 days






32. Front feet and head first. (except for hogs and dogs)






33. Larger the cow - more milk is produced; smaller the cow - less milk is produced






34. Not under a timeline - cow can not be sold as steak






35. Days which have decreasing daylight hours

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36. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






37. 336 days






38. Why does estrus happen before ovulation?






39. Days which have increasing daylight hours

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40. (male) pushes the testes upward toward the body for warmth or protection






41. Can survive ~7 days in cow. vast majority <48 hours






42. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






43. What makes the milk flow through the mammary glands?






44. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






45. FEED






46. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






47. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






48. 1. brain function - 2. blood flow - 3. willing female






49. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






50. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %